活套高度闭环和张力闭环控制投入时机的选择

来源期刊：冶金自动化2010年第4期

论文作者：张铁壁 宗胜悦 李光

文章页码：57 - 60

关键词：热连轧； 活套高度闭环控制； 活套张力闭环控制

Key words：hot strip mill； closed-loop height control of looper； closed-loop tension control of looper

摘    要：热连轧过程中利用位置环起套时经常会造成活套位置超调,从而造成带钢头部被拉窄拉薄。但是通过跟踪套量变化曲线,可以预先判断活套与带钢接触的时机,从而快速退出位置环,减小由于活套位置环起套超调造成的拉钢。针对活套起套过程,提出一种确定活套高度闭环和张力闭环投入时机的算法,经过现场实际应用,效果明显,使起套过程控制获得极大改善,确认这是一种行之有效的方法。文中还就该算法在起套过程中遇到的几个问题进行了探讨。

Abstract: Operating in the closed-loop position control mode in the initial looper rise in hot strip rolling often induces big position overshoot that deteriorates quality of thickness or width of the head of the rolled strip.In practice,the time when the looper rises to touch the strip can be estimated in advance from deviation of the looper position,and therefore used as a leading information for exiting the position control to reduce position overshoot.The switching times that activate the closed-loop height or tension control of the loopers in a hot strip mill are mainly determined by the corresponding looper rise sequences.An algorithm to determine the time to activate the closed-loop height and tension control of the loopers is introduced in this paper.The practical tests indicate that the proposed algorithm is feasible and effective.The problems encountered in the practical tests using the algorithm in looper rise sequence are also discussed in this paper.